<template>
    <div class="list" ref="wrap">
      <div>
        <div class="area">
            <div class="title border-topbottom">当前城市</div>
            <div class="button-list">
              <div class="button-wrap">
                <div class="button">{{this.currentCity}}</div>
              </div>
            </div>
        </div>
        <div class="area">
            <div class="title border-topbottom">热门城市</div>
            <div class="button-list">
              <div class="button-wrap"
              v-for="item of hotList"
              :key="item.id"
              @click="handleCityClick(item.name)">
                <div class="button">{{item.name}}</div>
            </div>
        </div>
        <div class="area"
        v-for="(value, key) of citys"
        :key="key"
        :ref="key">
            <div class="title border-topbottom">{{key}}</div>
            <div class="item-list">
              <div class="item border-bottom"
              v-for="item of value"
              :key="item.id"
              @click="handleCityClick(item.name)">{{item.name}}</div>
            </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    citys: Object,
    hotList: Array,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrap)
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  activated () {
    this.scroll.refresh()
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 1.7rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      background: #eee
      text-indent: .2rem
      color: #666
      font-size: .26rem
    .button-list
      padding: .1rem .6rem .1rem .1rem
      overflow: hidden
      .button-wrap
        float:left
        width: 33.33%
      .button
        margin: .1rem
        padding: .1rem 0
        text-align: center
        border: .02rem solid #ccc
        border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        text-indent: .2rem
</style>
